Carat To Milligram Conversion Chart

Carat (ct) Milligram (mg)
0.01 ct2 mg
0.1 ct20 mg
1 ct200 mg
2 ct400 mg
5 ct1000 mg
10 ct2000 mg
20 ct4000 mg
50 ct10000 mg
100 ct20000 mg
500 ct100000 mg
1000 ct200000 mg

Convert from carat to milligram formula

Total milligram = Total carat x 200

For example, if you want to convert 100 Carat to Milligram then,

100 ct = 100 x 200 = 20000 mg

Convert from milligram to carat formula

Total carat =
Total milligram
20000 mg
= 100 ct


The carat (ct) is a unit of mass equal to 200 mg, and is used for measuring gemstones and pearls, sometimes known as the metric carat. In terms of diamonds, a paragon is a flawless stone of at least 100 carats.


A unit of measurement of mass in the metric system equal to a thousandth of a gram, and equivalent to 0.0154 grain.